Charge pump circuit and power supply circuit

Details Charge pump circuit and power supply circuit Charge pump circuit and power supply circuit

2006-05-23

2006-05-23

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

Reexamination Certificate

active

07050315

ABSTRACT:
A charge pump circuit is provided for generating a voltage (1+1
) times as high as a supply voltage. The charge pump circuit eliminates the need for diodes for preventing a current from flowing back from a high potential side of capacitors to prevent a reduction in the voltage due to a forward voltage, and reduces a reactive current and latch-up when the charge pump circuit is integrated into a single IC chip. The charge pump circuit includes a fourth switching element having a substrate gate connected to a drain for preventing a current from flowing back to an input terminal from a high potential side of fly back capacitors connected in series, and a second switching element having a substrate gate connected to a drain for preventing a current from flowing back from a high potential side of a catch-up capacitor to the fly back capacitors connected in series.

REFERENCES:
patent: 5461557 (1995-10-01), Tamagawa
patent: 6438005 (2002-08-01), Walter
patent: 6738272 (2004-05-01), Yamanaka et al.
patent: 10-14218 (1998-01-01), None
patent: 2001-169537 (2001-06-01), None

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